dark theme

In Android Pie update for Galaxy S9 and S9+, you can use the night mode on Galaxy S9 and S9+ to get the dark (black) theme at any time (not only in the night).

The night mode on Galaxy S9 and S9+ with Android Pie update is the combination of the dark theme and night mode. In the stock Android Pie, the settings of dark theme and night mode are independent of each other.

This Galaxy S9 Android Pie update guide explains the details of the night mode on Galaxy S9 and S9+ with Android Pie update, and how to use the night mode so that you can enjoy the phone in all situations.

In Android Pie, Google introduced a dark theme. But it does not apply to Settings or to most Google apps.

Besides, Android Pie also introduced the night mode in developer options. But it is independent of the theme settings if dark them is used already. You may refer to this guide on how to use the dark theme and night mode in stock Android Pie.